Because all the intelligence agencies (which manufacture false flags for war) are against him, as Tho Bishop of the Mises Institute writes:

Libertarians shouldn't overlook the biggest benefit of the whole debate over Russia hacking, which is that Donald Trump has now become the greatest threat to the "Intelligence" community in recent history. Obviously this is not due to Trump being a secret libertarian, or his business background making him results-oriented, it's precisely because he can be a vindictive asshole.Trump's greatest chance for success - from a libertarian perspective - largely stems directly from his vices rather than his virtues.Trump sees the CIA, FBI, NSA, etc. as agencies attempting to undermine the credibility of his election. That makes them enemies in Trump's eyes, which is exactly how they have longed been viewed by libertarians. The fact it's personal with Trump, rather than principled for libertarians, is relatively inconsequential.Since military leaders have a long history of butting heads with intelligence agencies, the fact Trump has surrounded himself with generals is a further positive in this area - as is the fact his pick for CIA director is a CIA-outsider (his own troubling views on civil liberties not withstanding.) Since, by all accounts, Trump is largely impacted by the last opinion he hears - I'm comforted by the fact that he has surrounded himself with people who probably have more than a few grudges against the CIA.While it's highly unlikely Trump will leave the American intelligence community in a state that will gain the approval of a Justin Amash or Rand Paul, considering its been one of the most dangerous institutions in modern history - any steps taken to rein it in should be celebrated.